[Nazunasoft (Katsura Harufumi)] Rikujoubu no Boyish na Osananajimi ga suru Dare ni mo Ienai Koto | The Secret Thing My Tomboyish Childhood Friend From The Track Team Does That She Can’t Tell Anyone About. [Comoop]

A towering, dark-skinned track coach and his muscular, pixie-cut childhood friend turn old affection into a dangerously private bargain. Talk of switching partners, promised rewards, and being overly excited escalates into a coercive encounter where her ample breasts, thick thighs, and taut tracksuit intensify the struggle for control. Their strained expressions and commanding dialogue build toward an explosive collision of secrecy, blackmail, and reluctant desire.